internal/context

add_entry

pub fn add_entry(key: String, value: a) -> Nil

Stores the value as referenced by key only if no value is already present.

This returns the stored value.

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pub fn erase(key: String) -> Bool

Erase the value referenced by key.

Returns True if there was a value, False otherwise.

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pub fn get_orelse(key key: String, or default: a) -> a

Retrieve the value referenced by key or default if not present.